From: Viresh Kumar <viresh.kumar@linaro.org>
To: dirk.brandewie@gmail.com
Cc: linux-kernel@vger.kernel.org, cpufreq@vger.kernel.org
Subject: Re: [PATCH 2/5] cpufreq: Only call cpufreq_out_of_sync() with drivers that implement cpufreq_driver.target()
Date: Thu, 7 Feb 2013 16:03:16 +0530 [thread overview]
Message-ID: <CAOh2x=mjWxSM+WzReHgbnjHmft7yiP6OOf5p-kwpqh2Ykp_O0A@mail.gmail.com> (raw)
In-Reply-To: <1360170133-5066-4-git-send-email-dirk.brandewie@gmail.com>
On Wed, Feb 6, 2013 at 10:32 PM, <dirk.brandewie@gmail.com> wrote:
> From: Dirk Brandewie <dirk.brandewie@gmail.com>
>
> Scaling drivers that implement cpufreq_driver.setpolicy() have
> internal governors that do not signal changes via
> cpufreq_notify_transition() so the frequncy in the policy will almost
> certainly be different than the current frequncy. Only call
> cpufreq_out_of_sync() when the underlying driver implements
> cpufreq_driver.target()
>
> Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
> ---
> drivers/cpufreq/cpufreq.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index bb45f93..0ba0344 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -1798,7 +1798,7 @@ int cpufreq_update_policy(unsigned int cpu)
> pr_debug("Driver did not initialize current freq");
> data->cur = policy.cur;
> } else {
> - if (data->cur != policy.cur)
> + if (data->cur != policy.cur && driver->target)
> cpufreq_out_of_sync(cpu, data->cur,
> policy.cur);
Looks much better now :)
next prev parent reply other threads:[~2013-02-07 10:33 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-06 17:02 [PATCH 0/5] Add P state driver for Intel Core Processors dirk.brandewie
2013-02-06 17:02 ` [PATCH 1/5] cpufreq: Retrieve current frequency from scaling drivers with internal governors dirk.brandewie
2013-02-07 13:46 ` Viresh Kumar
2013-02-06 17:02 ` [PATCH 2/5] cpufreq: Only call cpufreq_out_of_sync() for driver that implement cpufreq_driver.target() dirk.brandewie
2013-02-06 17:02 ` [PATCH 2/5] cpufreq: Only call cpufreq_out_of_sync() with drivers " dirk.brandewie
2013-02-07 10:33 ` Viresh Kumar [this message]
2013-02-06 17:02 ` [PATCH 3/5] cpufreq: Do not track governor name for scaling drivers with internal governors dirk.brandewie
2013-02-07 10:43 ` Viresh Kumar
2013-02-07 13:45 ` Viresh Kumar
2013-02-06 17:02 ` [PATCH 4/5] cpufreq_stats: do not remove sysfs files if frequency table is not present dirk.brandewie
2013-02-06 17:02 ` [PATCH 5/5] cpufreq/x86: Add P-state driver for sandy bridge dirk.brandewie
2013-02-07 14:01 ` Viresh Kumar
2013-02-07 10:42 ` [PATCH 0/5] Add P state driver for Intel Core Processors Viresh Kumar
2013-02-07 14:02 ` Viresh Kumar
2013-02-07 22:43 ` Rafael J. Wysocki
2013-02-12 21:49 ` Dave Jones
2013-02-13 16:38 ` Dirk Brandewie
2013-02-13 21:17 ` Rafael J. Wysocki
2013-02-14 18:38 ` [PATCH] cpufreq/intel_pstate: Add kernel command line option disable intel_pstate dirk.brandewie
2013-02-14 22:56 ` Yinghai Lu
2013-02-15 4:23 ` Viresh Kumar
2013-02-15 12:30 ` Rafael J. Wysocki
2013-02-15 13:28 ` Viresh Kumar
2013-02-15 16:12 ` Dirk Brandewie
2013-02-15 16:15 ` dirk.brandewie
2013-02-14 4:08 ` [PATCH 0/5] Add P state driver for Intel Core Processors Viresh Kumar
2013-02-14 12:21 ` Rafael J. Wysocki
2013-02-14 15:23 ` Dirk Brandewie
2013-02-14 15:34 ` Dirk Brandewie
2013-02-14 17:36 ` Rafael J. Wysocki
2013-02-13 20:14 ` [PATCH] cpufreq/intel_pstate: Change to disallow module build dirk.brandewie
2013-02-13 20:14 ` dirk.brandewie
2013-02-14 16:10 ` Viresh Kumar
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